What criteria can be used to classify rocks and minerals?

One day, while walking in a park, you find a stone encrusted with small colored bits and decide to keep it for the centerpiece of your rock collection. Back at home, you decide to subject it to some tests to find out what kind of stone it is. The first thing to do is figure out if your find is a rock or a mineral. How will you go about unmasking the identity of your mysterious stone?
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